221112011211 has 32 divisors (see below), whose sum is σ = 372657266688. Its totient is φ = 113478330240.

The previous prime is 221112011207. The next prime is 221112011231. The reversal of 221112011211 is 112110211122.

It is a happy number.

It is not a de Polignac number, because 221112011211 - 2² = 221112011207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221112011201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10934955 + ... + 10955156.

It is an arithmetic number, because the mean of its divisors is an integer number (11645539584).

Almost surely, 2^221112011211 is an apocalyptic number.

221112011211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221112011211 is a deficient number, since it is larger than the sum of its proper divisors (151545255477).

221112011211 is a wasteful number, since it uses less digits than its factorization.

221112011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21890171.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221112011211 its reverse (112110211122), we get a palindrome (333222222333).

The spelling of 221112011211 in words is "two hundred twenty-one billion, one hundred twelve million, eleven thousand, two hundred eleven".